My Condor (british made as well) 56cm has about a cm of overlap with 165 cranks, size 42 shoes and 700x23 tires.
What size tires do you have? And how much tire clearance in the rear? If there's more in the back then it might not be the original fork.
I'm guessing by 'off road' you mean grass tracks? Traditional grass track bikes should have clearance for larger tires. The presence of brazeons suggests it might've been a custom time trialing bike which could explain the cable routing.